KaneAI - World’s First E2E Software Testing Agent.Book a Demo Join TestMu Conference

How to use addNewDeferConstructor method of org.powermock.core.transformers.javassist.support.PowerMockExpressionEditor class

Best Powermock code snippet using org.powermock.core.transformers.javassist.support.PowerMockExpressionEditor.addNewDeferConstructor

Source:PowerMockExpressionEditor.java

...133             * constructor should be suppressed (which we don't know at this134             * moment of time) the parent class must have a default135             * constructor that we can delegate to.136             */137            addNewDeferConstructor(clazz);138            final StringBuilder code = new StringBuilder();139            code.append("{Object value =")140                .append(mockGetawayClass.getName())141                .append(".constructorCall($class, $args, $sig);");142            code.append("if (value != ").append(MockGateway.class.getName()).append(".PROCEED){");143            /*144             * TODO Suppress and lazy inject field (when this feature is ready).145             */146            if (superclass.getName().equals(Object.class.getName())) {147                code.append(" super();");148            } else {149                code.append(" super((").append(IndicateReloadClass.class.getName()).append(") null);");150            }151            code.append("} else {");152            code.append("   $proceed($$);");153            code.append("}}");154            c.replace(code.toString());155        }156    }157    158    @Override159    public void edit(FieldAccess f) throws CannotCompileException {160        if (f.isReader()) {161            CtClass returnTypeAsCtClass;162            FieldInfo fieldInfo;163            164            try {165                CtField field = f.getField();166                returnTypeAsCtClass = field.getType();167                fieldInfo = field.getFieldInfo2();168            } catch (NotFoundException e) {169                    /*170                     * If multiple java agents are active (in INST_REDEFINE mode), the types implicitly loaded by javassist from disk171                     * might differ from the types available in memory. Thus, this error might occur.172                     *173                     * It may also happen if PowerMock is modifying an SPI where the SPI require some classes to be available in the classpath174                     * at runtime but they are not! This is valid in some cases such as slf4j.175                     */176                return;177            }178            179            if (isNotSyntheticField(fieldInfo)) {180                String code = "{Object value =  " +181                                  MockGateway.class.getName() +182                                  ".fieldCall(" +183                                  "$0,$class,\"" +184                                  f.getFieldName() +185                                  "\",$type);" +186                                  "if(value == " + MockGateway.class.getName() + ".PROCEED) {" +187                                  "	$_ = $proceed($$);" +188                                  "} else {" +189                                  "	$_ = " + getCorrectReturnValueType(returnTypeAsCtClass) + ";" +190                                  "}}";191                f.replace(code);192            }193        }194    }195    196    /**197     * Create a defer constructor in the class which will be called when the198     * constructor is suppressed.199     *200     * @param clazz The class whose super constructor will get a new defer201     *              constructor if it doesn't already have one.202     * @throws CannotCompileException If an unexpected compilation error occurs.203     */204    private void addNewDeferConstructor(final CtClass clazz) throws CannotCompileException {205        final CtClass superClass;206        try {207            superClass = clazz.getSuperclass();208        } catch (NotFoundException e1) {209            throw new IllegalArgumentException("Internal error: Failed to get superclass for " + clazz.getName() + " when about to create a new default constructor.");210        }211        212        ClassPool classPool = clazz.getClassPool();213        /*214         * To make a unique defer constructor we create a new constructor215         * with one argument (IndicateReloadClass). So we get this class a216         * Javassist class below.217         */218        final CtClass constructorType;219        try {220            constructorType = classPool.get(IndicateReloadClass.class.getName());221        } catch (NotFoundException e) {222            throw new IllegalArgumentException("Internal error: failed to get the " + IndicateReloadClass.class.getName()223                                                   + " when added defer constructor.");224        }225        clazz.defrost();226        if (superClass.getName().equals(Object.class.getName())) {227            try {228                clazz.addConstructor(CtNewConstructor.make(new CtClass[]{constructorType}, new CtClass[0], "{super();}", clazz));229            } catch (DuplicateMemberException e) {230                // OK, the constructor has already been added.231            }232        } else {233            addNewDeferConstructor(superClass);234            try {235                clazz.addConstructor(CtNewConstructor.make(new CtClass[]{constructorType}, new CtClass[0], "{super($$);}", clazz));236            } catch (DuplicateMemberException e) {237                // OK, the constructor has already been added.238            }239        }240    }241    242    243}...

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.